CN113485182A - Method for automatically generating material yard belt flow control program - Google Patents

Abstract

The invention discloses a method for automatically generating a material yard belt flow control program. The method comprises the following steps: 1) writing a writing engine according to the generated ST statement; 2) the engine reads each equipment definition rule, the equipment relation definition rule and the process definition rule in sequence to obtain the relation between the turning plate and the belt conveyor; 3) the engine processes according to predetermined rules to generate ST text. In the invention, the engine generates the ST sentences through the writing rules and meanings of the appointed codes, so that the ST sentences can be continuously produced only by developing an engine program and adjusting the rules later, and the method has the advantages of convenient modification, simple initialization, time saving and labor saving.

Description

Method for automatically generating material yard belt flow control program

Technical Field

The invention relates to the field of PLC control. The invention provides a method for automatically generating a material yard belt flow control program. The method realizes the automatic programming of the PLC program of the flow of the material field belt conveyor.

Background

There are five standardized programming languages for PLC: three graphic languages of a Sequential Function Chart (SFC), a Ladder Diagram (LD) and a function module diagram (FBD), and two text languages of a statement list (IL) and a Structure Text (ST).

The structured text programming language adopts a description mode of a computer to describe various operational relations among various variables in the system, and the required functions or operations are completed. Most PLC manufacturers use structured text programming languages similar to high-level languages such as BASIC, PASCAL, or C, but for convenience of application, the expression method of sentences and the types of sentences are simplified. The characteristics of the structured text programming language: the programming is carried out by adopting a high-level language, and more complex control operation can be completed; requires a certain knowledge and programming skill of a high-level computer language and has higher requirements for engineering designers. The intuitiveness and operability are poor.

In a stock ground belt flow control system, a large number of belt conveyor devices exist, and front-back sequential management exists among the belt conveyor devices; still have between the belt feeder equipment and turn over the board route, beat different positions through turning over the board, select different belt feeders, and then walk different belt flow path. This requires the control system to define a large number of variables, each of which requires setting of initialization relationships, and a change in one device during debugging often results in a change in definition between the variables, which can be modified in as many as tens of thousands of ST statements without error, with a tremendous amount of effort and inefficiency.

Disclosure of Invention

In order to overcome the defects, the invention designs a method for automatically generating a material yard belt flow control program.

In order to achieve the above object, the method for automatically generating a stock ground belt flow control program of the present invention comprises:

1) writing a writing engine according to the ST statements required to be generated;

2) the engine reads each equipment definition rule, the equipment relation definition rule and the process definition rule in sequence to obtain the relation between the turning plate and the belt conveyor;

3) the engine processes according to predetermined rules to generate ST text.

Wherein the device definition rule comprises a device name and a unique serial number of the device,

wherein the device relation definition rule describes the dynamic relation of the turning plate corresponding to the belt conveyor,

the process definition rule is used for stipulating the belt conveyor and the plate turnover equipment which pass through a certain process from beginning to end and the sequence of the belt conveyor and the plate turnover equipment.

Wherein, the engine is written by java language.

In the invention, the engine generates the ST sentences through the writing rules and meanings of the appointed codes, so that the ST sentences can be continuously produced only by developing an engine program and adjusting the rules later, and the method has the advantages of convenient modification, simple initialization, time saving and labor saving.

Drawings

FIG. 1 is a system configuration diagram

FIG. 2 is a dynamic relationship diagram of a turning plate corresponding to a belt conveyor

FIG. 3 is a flow chart

Detailed Description

The ST statement in the structured text programming language is a language based on text, and the ST statement text is automatically generated through another high-level language such as java according to a predefined rule and then is imported into a PLC system, so that the PLC programming based on the ST statement is automatically completed. The ST sentences are generated through the rules, so that the ST sentences can be continuously produced only by developing a java program and adjusting the rules later, the modification is convenient, the initialization is simple, the time and the labor are saved, and tens of thousands of sentences which are manually input in the past can be generated within 1 second.

As shown in fig. 1, the present invention mainly comprises the following components:

an ST statement automatic generation engine: modules written in a high-level language that automatically generate ST statements according to rules. The high-level language is not limited to JAVA or the like. The engine can have multiple functions, such as an initialization process, an initialization device, sequential assignment of the flaps, and the like.

2. Device definition rules: the device definition rule comprises a device name and a unique serial number of the device, and the device and the serial number of the device are separated by a blank space. Such as: 201 belt conveyor 464; z1 belt conveyor 421; z2 belt conveyor 460; 201 turning plate 463

3. Device relationship definition rules: mainly described is the dynamic relation of the turning plate corresponding to the belt conveyor, the turning plate is like a dial switch, like figure 2, the B31 turning plate corresponds to two belt conveyors, if the turning plate is dialed to the upper part, the turning plate is 1 in the program and corresponds to the Z1 belt conveyor (421); if the user dials down, the program is 2, and the Z2 corresponds to the belt conveyor (460). A device relationship definition rule specifies such a set of relationship data.

4. The flow defines the rule: the device is mainly used for stipulating the belt conveyor and the plate turnover equipment which pass through a certain process from beginning to end and the sequence of the belt conveyor and the plate turnover equipment. As shown in fig. 3, one flow rule is composed of a flow number, a start point, an end point, and a device through which the flow passes. Wherein the device contains the device name and the device serial number.

ST sentence text: and generating an ST statement text which can directly make the PLC run. As shown below, the specific format is different for each item and PLC, and is defined by each item.

The following example shows initialization of device number 464 (201 belt conveyor) in the middle of flow number 221. "MX _ Flow". Flow [221]. Flow [464 ═ 1;

the following example shows that when 201 flap 463 is in the 1 state, Z1 belt 421 is selected; when 201 flap 463 is in state 2, Z2 belt conveyor 460 is selected.

MX_Mar_K.Device_Infeed[421]:＝(MX_POS_K.Device_Pos[463]＝1)AND MX_Mar_K.Device_Outfeed[463]；

MX_Mar_K.Device_Infeed[460]:＝(MX_POS_K.Device_Pos[463]＝2)AND MX_Mar_K.Device_Outfeed[463]；

As long as the writing rule and meaning of the code are agreed, the engine A can automatically generate the ST statement according to the equipment definition rule B, the equipment relation definition rule C and the process definition rule D.

Example 1

One main flow initialization ST statement is generated as follows:

a) writing engine A, which needs to be written according to the generated ST statements. After the writing is finished, the writing can be circularly used for many times. The present embodiment of engine a is written in java language, but is not limited to this.

b) The default definition in the process initialization PLC is as follows: "MX _ Flow". Flow [221]. Flow [464 ═ 1; the numbers in the square broad are automatically generated according to rules, and other characters are died by default. Each initialization statement is the same. The process initialization means that all processes and devices in each process are traversed, and each device in each process number is assigned with 1.

c) The engine a reads the flow definition rule D, removes the starting point and the ending point, and reads each device, since the device and the device number are separated by a space, the device number is easily read, and the initial assignment is completed by adding the previous flow number.

d) And then all the devices in the process are circulated to carry out initialization assignment. And finally, traversing and completing all the processes and completing the initialization assignment of all the process equipment.

Example 2

A main flipper initialization ST statement is generated as follows

a) Writing engine A, which needs to be written according to the generated ST statements. After the writing is finished, the writing can be circularly used for many times. The present embodiment of engine a is written in java language, but is not limited to this.

b) Reading an equipment relation definition rule C, and obtaining that the 201 turning plate has two corresponding belt conveyors, namely a Z1 belt conveyor and a Z2 belt conveyor.

c) Reading the equipment definition rule B to obtain respective equipment serial numbers of the 201 turning plate, the Z1 belt conveyor and the Z2 belt conveyor

d) And defining variable and non-variable parts in the ST text. Where below in brackets are variable and others are invariable parts.

MX_Mar_K.Device_Infeed[421]:＝(MX_POS_K.Device_Pos[463]＝1)AND MX_Mar_K.Device_Outfeed[463]；

MX_Mar_K.Device_Infeed[460]:＝(MX_POS_K.Device_Pos[463]＝2)AND MX_Mar_K.Device_Outfeed[463]；

e) The ST text is generated in accordance with the schedule processing.

f) And sequentially inquiring the device relation definition rules, and circularly generating the ST text. And finally, guiding the data into the PLC.

This patent has been given above 2 examples, but it should be understood by those skilled in the art that it is not limited to this example.

Claims (5)

1. A method for automatically generating a stock yard belt flow control program is characterized by comprising the following steps:

1) writing a writing engine according to the ST statements required to be generated;

2) the engine reads each equipment definition rule, the equipment relation definition rule and the process definition rule in sequence to obtain the relation between the turning plate and the belt conveyor;

3) the engine processes according to predetermined rules to generate ST text.

2. The method for automatically generating the stock ground belt flow control program according to claim 1, wherein the equipment definition rule comprises an equipment name and a unique serial number of the equipment,

3. the method for automatically generating the material yard belt flow control program according to claim 1, wherein the equipment relationship definition rule describes a dynamic relationship of the turning plate corresponding to the belt conveyor,

4. the method of automatically generating a flow control program for a material yard belt as claimed in claim 1, wherein said flow defining rules are used to define the belt conveyors and flap devices through which a certain flow passes from beginning to end and their sequence.

5. The method for automatically generating a stock ground belt flow control program as claimed in claim 1, wherein the engine is written in java language.

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